Suppose a Research Firm Conducted a Survey to Determine the Average

Multiple Choice

Suppose a research firm conducted a survey to determine the average amount of money steady smokers spend on cigarettes during a week. A sample of 100 steady smokers revealed that the sample mean is $80 and the sample standard deviation is $20. What is the probability that a sample of 100 steady smokers spend between $76 and $84?

A) 0.4772
B) 0.0228
C) 0.9544
D) 0.3400
E) 0.9999